US3989185A - Centrifugal machine - Google Patents

Centrifugal machine Download PDF

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Publication number
US3989185A
US3989185A US05/589,349 US58934975A US3989185A US 3989185 A US3989185 A US 3989185A US 58934975 A US58934975 A US 58934975A US 3989185 A US3989185 A US 3989185A
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US
United States
Prior art keywords
distributor
receptacle
machine
bowl
set forth
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
US05/589,349
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English (en)
Inventor
Andre Mercier
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Fives Cail Babcock SA
Original Assignee
Fives Cail Babcock SA
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Fives Cail Babcock SA filed Critical Fives Cail Babcock SA
Application granted granted Critical
Publication of US3989185A publication Critical patent/US3989185A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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    • C—CHEMISTRY; METALLURGY
    • C13—SUGAR INDUSTRY
    • C13B—PRODUCTION OF SUCROSE; APPARATUS SPECIALLY ADAPTED THEREFOR
    • C13B30/00—Crystallisation; Crystallising apparatus; Separating crystals from mother liquors ; Evaporating or boiling sugar juice
    • C13B30/04—Separating crystals from mother liquor
    • C13B30/06—Separating crystals from mother liquor by centrifugal force
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B04—CENTRIFUGAL APPARATUS OR MACHINES FOR CARRYING-OUT PHYSICAL OR CHEMICAL PROCESSES
    • B04B—CENTRIFUGES
    • B04B11/00—Feeding, charging, or discharging bowls
    • B04B11/02—Continuous feeding or discharging; Control arrangements therefor
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B04—CENTRIFUGAL APPARATUS OR MACHINES FOR CARRYING-OUT PHYSICAL OR CHEMICAL PROCESSES
    • B04B—CENTRIFUGES
    • B04B11/00—Feeding, charging, or discharging bowls
    • B04B11/06—Arrangement of distributors or collectors in centrifuges
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B04—CENTRIFUGAL APPARATUS OR MACHINES FOR CARRYING-OUT PHYSICAL OR CHEMICAL PROCESSES
    • B04B—CENTRIFUGES
    • B04B3/00—Centrifuges with rotary bowls in which solid particles or bodies become separated by centrifugal force and simultaneous sifting or filtering

Definitions

  • This invention relates to centrifugal machines, and particularly to centrifugal apparatus having an improved feeding device for separating a viscous slurry into solid and liquid fractions.
  • the centrifugal machine of the invention has a bowl and a drive arrangement which includes a hub portion of the bowl.
  • a receptacle is mounted in the bowl for rotation about the bowl axis, and an axially terminal portion of the receptacle is open in one axial direction.
  • the annular inner face of a distributor spacedly envelops the terminal receptacle portion and flares in the other axial direction.
  • Radial arms interposed between the hub portion and the inner distributor face secure the distributor to the bowl for joint rotation.
  • Two recesses contiguously adjacent each arm in respective circumferential directions are axially open and radially open toward the axial passages defined between the arms, the arms and recesses being located in a common radial plane.
  • the slurry to be processed is fed to the receptacle.
  • FIG. 1 shows a centrifugal filter of the invention in fragmentary elevational section
  • FIG. 2 illustrates a portion of the apparatus of FIG. 1 on a larger scale
  • FIG. 3 is a fragmentary section of the device of FIG. 2 taken on the line III -- III.
  • the housing 1 of a centrifugal filter whose bowl 2 is rotated about a normally vertical axis by a conventional drive arrangement of which the hub portion 3 of the bowl 2 is the terminal element.
  • the imperforate, axial wall 4 of the bowl 2 is fixedly fastened to the hub portion 3, flares conically in an upward direction, and is lined with a wire screen 5.
  • Separate overflows 6, 7 near the upper rim of the bowl lead from the annular space between the screen 5 and bowl 4 into a trough 8, and from the upper end of the screen 5 into a trough 9 for separately collecting the liquid and solid fractions of a slurry fed to the inner face of the screen 5, as is conventional.
  • This invention is more specifically concerned with the feeding arrangement for depositing the slurry to be filtered on the screen 5.
  • the free top face of the hub portion 3 carries a coaxial, dish-shaped receptacle 10 whose axially terminal top portion is open in an axially upward direction, and from whose bottom an apertured radial flange 11 projects.
  • the flange 11 is clamped axially between an element 12 having the shape of an inverted, conically flaring cup, and an element 13, hereinafter referred to as the rim element, which flares conically in a downward direction toward its free rim, the elements 12, 13 having inner axial faces of circular cross section about the axis of bowl rotation.
  • the radial wall 14 of the cup-shaped element 12 has a central aperture through which a feed pipe 15, fixedly mounted on the housing 1, extends toward the receptacle 10.
  • An inner, annular, axial wall 16 of the element 12 extends downward from the radial wall 14 to bound a feed channel and to contain material splashing from the surface of the slurry in the receptacle 10.
  • the top edge 17 of the receptacle 10 is serrated and offset axially upward from the lower edges of the wall 14 and of the feed pipe 15. Slurry entering the receptacle from the pipe 15 is centrifugally distributed from the edge 17 to the inner face of the distributor 18 constituted by the elements 12, 13 and by the peripheral portion 19 of the flange 11, the flange being fastened between the elements 12, 13 by screws 20.
  • Circumferentially elongated identical openings 21 along the peripheral portion 19 are separated from each other by radial arm portions 22 of the flange 11.
  • the openings 21 provide axial passages through the flange 11 adjacent the flaring inner face of the distributor 18.
  • Each opening 21 is bounded in a radially outward direction by a circumferentially central, cylindrically concave face portion 23 of the flange 11 and by two recesses 24 contiguously adjacent the arms 22.
  • the recesses are radially open toward the opening 21 and their wall surfaces are parallel to the axis of bowl rotation.
  • the face portions 23 are flush with the conical inner face of the distributor element 12 and project radially inward beyond the conical inner face of the rim element 13, whereas the wall surfaces bounding the recesses 24 are at least partly flush with the rim element 13.
  • slurry is deposited in a film of fairly uniform thickness from the top edge 17 of the receptacle 10 on the inner axial face of the cup-shaped distributor element 12, and the film moves downward under the combined effect of gravity and centrifugal forces. Any initial non-uniformity is reduced by surface tension effects.
  • the film reaches the common radial plane of the arms 22 and of the passages 21, the circumferential portions of the film axially aligned with the cylindrical face portions 23 continue their downward movement although they are temporarily relieved of effective centrifugal forces.
  • the film portions initially aligned with the arms 22 are deflected into the recesses 24 which are deep enough to accomodate the additional amount of slurry so that the slurry has an approximately uniformly cylindrical, exposed face in each opening 21 from one arm 22 to the other.
  • the suddenly increased cross section of the inner distributor face produces the surface tension and centrifugal forces which draw portions of the heavier slurry streams axially discharged from the recesses 24 into the face portions below the arms 22.
  • the slurry film is of perfectly uniform thickness when it reaches the free lower rim of the distributor 18, and is discharged therefrom toward the narrow, lower end of the screen 5.
  • Most of the liquid in the slurry passes through the screen, rises between the screen and the imperforate bowl wall 4 to the overflow 6, and is discharged into the trough 8, while the almost dry sugar crystals travel upward along the inner screen face to be discharged into the trough 9 from the overflow 7.
  • the dimensions of the recesses 24 need to be selected for the properties of the slurry to be separated, and the dimensional relationships shown particularly in FIG. 3 are illustrative of preferred practice in sugar manufacturing. Obviously, centrifugal apparatus intended for other purpose may benefit from the feeding arrangement of the invention, and the illustrated arrangement will readily be modified to suit the intended application.

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  • Chemical & Material Sciences (AREA)
  • Crystallography & Structural Chemistry (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Biochemistry (AREA)
  • Organic Chemistry (AREA)
  • Centrifugal Separators (AREA)
US05/589,349 1974-06-17 1975-06-23 Centrifugal machine Expired - Lifetime US3989185A (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR7420914A FR2274360A1 (fr) 1974-06-17 1974-06-17 Perfectionnements aux dispositifs d'alimentation pour separateurs centrifuges a marche continue
FR74.20914 1974-06-17

Publications (1)

Publication Number Publication Date
US3989185A true US3989185A (en) 1976-11-02

Family

ID=9140146

Family Applications (1)

Application Number Title Priority Date Filing Date
US05/589,349 Expired - Lifetime US3989185A (en) 1974-06-17 1975-06-23 Centrifugal machine

Country Status (12)

Country Link
US (1) US3989185A (2)
JP (1) JPS585105B2 (2)
BE (1) BE830296A (2)
BR (1) BR7503773A (2)
DE (1) DE2526866C2 (2)
ES (1) ES438454A1 (2)
FR (1) FR2274360A1 (2)
GB (1) GB1484744A (2)
IN (1) IN143482B (2)
IT (1) IT1038772B (2)
OA (1) OA05030A (2)
ZA (1) ZA753839B (2)

Cited By (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4109853A (en) * 1977-04-26 1978-08-29 De Dietrich & Cie, S.A. Centrifugal filter press
US4303193A (en) * 1979-01-22 1981-12-01 Haemonetics Corporation Apparatus for separating blood into components thereof
US4331482A (en) * 1979-09-11 1982-05-25 Braunschweigische Maschinenbauanstalt Continuously operating centrifuge
US4352451A (en) * 1980-09-25 1982-10-05 Fives-Cail Babcock Centrifugal drier
US5244502A (en) * 1990-11-30 1993-09-14 Braunschweigische Maschinenbauanstalt Ag Continuously operating centrifuge
WO1997016256A1 (en) * 1995-11-01 1997-05-09 Carr Separations, Inc. Low-shear centrifuge feeding system
US5674174A (en) * 1995-11-01 1997-10-07 Carr Separations, Inc. Low-shear feeding system for use with bottom feed centrifuges
WO2001089706A1 (en) * 2000-05-19 2001-11-29 Kendro Laboratory Products, L.P. Low-shear feeding system for use with centrifuges
CN101934252A (zh) * 2010-09-03 2011-01-05 李凯 上悬式离心机喂料系统
CN103949355A (zh) * 2014-05-06 2014-07-30 杨元清 一种三足式人工卸料离心机
EP2913112A1 (de) * 2014-02-26 2015-09-02 Ferrum AG Zentrifuge, sowie Verfahren zur Beladung einer Zentrifuge
US10513746B2 (en) 2016-10-18 2019-12-24 Western States Machine Company Continuous centrifuge systems with multiple-stage mixing
US20200316501A1 (en) * 2017-12-19 2020-10-08 Xeros Limited Filter for a treatment apparatus

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN113499865B (zh) * 2021-08-05 2024-01-23 钟晓璇 一种基于环境保护的环保烟头分离装置

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2753010A (en) * 1950-06-15 1956-07-03 American Enka Corp Process and apparatus for deaerating viscous liquids
US3205095A (en) * 1962-10-02 1965-09-07 Braunschweigische Maschb Ansta Sugar recovery centrifuge
US3630432A (en) * 1968-06-06 1971-12-28 Alfa Laval Ab Apparatus for separating a liquid mixture
US3682373A (en) * 1968-12-09 1972-08-08 Andre Mercier Centrifugal separator
US3837913A (en) * 1972-02-18 1974-09-24 Braunschweigische Masch Bau Continuously operating centrifuge

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2753010A (en) * 1950-06-15 1956-07-03 American Enka Corp Process and apparatus for deaerating viscous liquids
US3205095A (en) * 1962-10-02 1965-09-07 Braunschweigische Maschb Ansta Sugar recovery centrifuge
US3630432A (en) * 1968-06-06 1971-12-28 Alfa Laval Ab Apparatus for separating a liquid mixture
US3682373A (en) * 1968-12-09 1972-08-08 Andre Mercier Centrifugal separator
US3837913A (en) * 1972-02-18 1974-09-24 Braunschweigische Masch Bau Continuously operating centrifuge

Cited By (19)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4109853A (en) * 1977-04-26 1978-08-29 De Dietrich & Cie, S.A. Centrifugal filter press
US4303193A (en) * 1979-01-22 1981-12-01 Haemonetics Corporation Apparatus for separating blood into components thereof
US4331482A (en) * 1979-09-11 1982-05-25 Braunschweigische Maschinenbauanstalt Continuously operating centrifuge
US4352451A (en) * 1980-09-25 1982-10-05 Fives-Cail Babcock Centrifugal drier
US5244502A (en) * 1990-11-30 1993-09-14 Braunschweigische Maschinenbauanstalt Ag Continuously operating centrifuge
WO1997016256A1 (en) * 1995-11-01 1997-05-09 Carr Separations, Inc. Low-shear centrifuge feeding system
US5674174A (en) * 1995-11-01 1997-10-07 Carr Separations, Inc. Low-shear feeding system for use with bottom feed centrifuges
US5823937A (en) * 1995-11-01 1998-10-20 Carr; Robert B. Low-shear feeding system for use with centrifuges
WO2001089706A1 (en) * 2000-05-19 2001-11-29 Kendro Laboratory Products, L.P. Low-shear feeding system for use with centrifuges
US6616590B2 (en) 2000-05-19 2003-09-09 Kendro Laboratory Products, Lp Low-shear feeding system for use with centrifuges
EP1326714A4 (en) * 2000-05-19 2007-04-04 Pneumatic Scale Corp LOW STRAIN POWER SUPPLY SYSTEM FOR CENTRIFUGES
CN101934252A (zh) * 2010-09-03 2011-01-05 李凯 上悬式离心机喂料系统
CN101934252B (zh) * 2010-09-03 2012-07-11 李凯 上悬式离心机喂料系统
EP2913112A1 (de) * 2014-02-26 2015-09-02 Ferrum AG Zentrifuge, sowie Verfahren zur Beladung einer Zentrifuge
US10639647B2 (en) 2014-02-26 2020-05-05 Ferrum Ag Centrifuge with a feed device comprising a feed direction control and method of loading a centrifuge with a feed device comprising a feed direction control
CN103949355A (zh) * 2014-05-06 2014-07-30 杨元清 一种三足式人工卸料离心机
US10513746B2 (en) 2016-10-18 2019-12-24 Western States Machine Company Continuous centrifuge systems with multiple-stage mixing
US20200316501A1 (en) * 2017-12-19 2020-10-08 Xeros Limited Filter for a treatment apparatus
US12138568B2 (en) * 2017-12-19 2024-11-12 Xeros Limited Centrifugal filter unit for a washing machine having a removable portion shaped to scrape against a side wall during its removal

Also Published As

Publication number Publication date
AU8216075A (en) 1976-12-23
OA05030A (fr) 1980-12-31
JPS585105B2 (ja) 1983-01-29
GB1484744A (en) 1977-09-01
JPS5113475A (2) 1976-02-02
BE830296A (fr) 1975-10-16
BR7503773A (pt) 1976-07-06
DE2526866A1 (de) 1976-02-12
IT1038772B (it) 1979-11-30
FR2274360B1 (2) 1980-01-04
DE2526866C2 (de) 1986-11-27
FR2274360A1 (fr) 1976-01-09
ZA753839B (en) 1976-05-26
ES438454A1 (es) 1977-02-01
IN143482B (2) 1977-12-10

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